Provisioning app had renamed the API service to be less general so we need to change it on 3scale now as well.

The change: https://github.com/RHEnVision/provisioning-backend/pull/257

New info for gateway:

app: provisioning
namespace: provisioning-stage
service: provisioning-backend-api

new URL: http://provisioning-backend-api.provisioning-stage.svc.cluster.local:8000